'Limited number' of Galaxy Tab S units shipped with defective back covers

A number of Samsung Galaxy Tab S users have been reporting that the backs of their devices were becoming deformed, which is apparently due to defective back covers. While it was initially speculated that the deformation was the result of overheating, this appears now that this is not case. Samsung has apparently already solved the problem, which affected a limited number of devices. A Samsung spokesperson had this to say:

Contrary to certain media reports, the slight disfiguration that has formed on the rear surface of the Galaxy Tab S has been attributed to a limited number of defective back covers, which has no relation to the overheating of the application processor or the material used for the back cover. We would like to assure our customers that we have already resolved the issue. We ask affected customers to please contact their nearest Samsung Electronics customer service center.

Have you noticed any problems with the back of your Galaxy Tab S? Tell us below in the comments.